TradingDataCompare

IEX Cloud (Discontinued) vs Twelve Data

Head-to-head market data API comparison. Updated 2026-05-24.

Overall winner: Twelve Data — wins 4 of 7 comparison axes.

Side-by-Side Comparison

Feature IEX Cloud (Discontinued) Twelve Data
API Quality 3/5 4/5 ✓
Doc Quality 3/5 4/5 ✓
Data Latency second second
SDK Languages 5 languages 5 languages
Free Tier No Yes ✓
Affiliate Program No Yes
Asset Coverage Breadth 5 asset classes 6 asset classes ✓
Asset Coverage US Equities, US Options, Crypto, Forex, Commodities US Equities, Global Equities, Forex, Crypto, ETFs, Indices
Historical Depth Service discontinued 30+ years (daily); intraday varies by plan
Starting Price N/A $0/mo
Rate Limits Service discontinued Credit-based; each endpoint consumes different credit amount

IEX Cloud (Discontinued): Best For

  • Historical reference only

Not Ideal For

  • Any new project — service is shut down
Full IEX Cloud (Discontinued) review →

Twelve Data: Best For

  • Global coverage needs
  • Technical indicator API
  • Fintech apps
  • Forex + crypto combo

Not Ideal For

  • Tick data / HFT
  • Deep US options data
  • Large bulk downloads
Full Twelve Data review →

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